aren’t your average tree houses—it’s not known exactly when they were built, but they’re estimated to be between 800 and 1200 years old! In the late 1600s, the tree survived a lightning fire that hollowed out the center. Interpreting this occurrence as a holy event, the local priest at the time called for the tree to be turned into a church. The tree was still growing under the kingdom of Louis IX, and it survived the Hundred Years War with the English, The Black Death, the Reformation, and the